- You need an authorized (username & password) account to manage your photo albums. Otherwise, you can only view public albums.- If you don't have a Picasa account, go to http://picasaweb.google.com to register one.- The app is not developed by Google.- If you don't allow the app to access the location info in photos & videos the first time, you won't be able to access your photo library. To solve the problem, go to Settings app => Location Services => Find Picasa app to enable location service so that you can load your photo library in the app.